STMicroelectronics ST3232EC Datasheet
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ST3232EB
ST3232EC
±15 kV ESD protection 3 to 5.5 V low power, up to
250 kbps, RS-232 drivers and receivers
Datasheet
-
production data
•
Hand-held equipment
•
Peripherals and printers
SO-16
TSSOP16
Features
• ESD protection for RS-232 I/O pins
• ±15 kV human body model
• ±8 kV IEC 1000-4-2 contact discharge
• 300 µA supply current
• 250 kbps minimum guaranteed data rate
• 6 V/µs minimum guaranteed slew rate
• Meet EIA/TIA-232 specifications down to 3 V
• Available in SO-16 and TSSOP16
Description
The ST3232E is a 3 V powered EIA/TIA-232 and
V.28/V.24 communication interfaces with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (ESD) protection to ± 8 kV using IEC1000-4-2 contact discharge and ± 15 kV using the human body model. The ST3232E has a proprietary lowdropout transmitter output stage providing true
RS-232 performance from 3 to 5 V supplies with a dual charge pump. The charge pump requires only four small 0.1 µF standard external capacitors for operations from 3 V supply.
The ST3232E has two receivers and two drivers.
The device is guaranteed to run at data rates of
250 kbps while maintaining RS-232 output levels.
Applications
• Notebook, subnotebook and palmtop computers
•
Battery-powered equipment
Table 1. Device summary
Order code Temperature range
ST3232ECDR
ST3232EBDR
ST3232ECTR
ST3232EBTR
0 to 70 °C
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
Package
SO-16 (tape and reel)
SO-16 (tape and reel)
TSSOP16 (tape and reel)
TSSOP16 (tape and reel)
July 2018
This is information on a product in full production.
DocID8784 Rev 7 1/14 www.st.com
Contents
Contents
ST3232EB, ST3232EC
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SO-16 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TSSOP-16 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2/14 DocID8784 Rev 7
ST3232EB, ST3232EC
Figure 1. Pin connection
Pin configuration
Pin n°
13
14
15
16
9
10
11
12
7
8
5
6
3
4
1
2
Symbol
C
1
+
V+
C
1
-
C
2
+
C
2
-
V-
T2
OUT
R2
IN
R2
OUT
T2
IN
T1
IN
R1
OUT
R1
IN
T1
OUT
GND
V
CC
Table 2. Pin description
Name and function
Positive terminal for the first charge pump capacitor
Doubled voltage terminal
Negative Terminal for the first charge pump capacitor
Positive terminal for the second charge pump capacitor
Negative terminal for the second charge pump capacitor
Inverted voltage terminal
Second transmitter output voltage
Second receiver input voltage
Second receiver output voltage
Second transmitter input voltage
First transmitter input voltage
First receiver output voltage
First receiver input voltage
First transmitter output voltage
Ground
Supply voltage
DocID8784 Rev 7 3/14
14
Absolute maximum ratings ST3232EB, ST3232EC
Note:
Symbol
Table 3. Absolute maximum ratings
Parameter
V
CC
V+
V-
V+ +|V-|
T
IN
R
IN
T
OUT
R
OUT t
SHORT
T j
Supply voltage
Doubled voltage terminal
Inverted voltage terminal
R
R th-jc th-ja
Transmitter input voltage range
Receiver input voltage range
Transmitter output voltage range
Receiver output voltage range
Transmitter output short-to-ground time
Maximum junction temperature
Thermal resistance junction-to-case
(1) (2)
SO-16
TSSOP16
Thermal resistance junction-to-ambient
(1) (2)
SO-16
TSSOP16
1.
Short-circuits can cause excessive heating and destructive dissipation.
2.
R th
are typical values.
Value
-0.3 to 6
(V
CC
- 0.3) to 7
0.3 to -7
13
-0.3 to 6
± 25
±
13.2
-0.3 to (V
CC
+ 0.3)
Continuous
150
30
25
95
95
°C
°C/W
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Externally applied V+ and V- can have a maximum magnitude of +7 V, but their absolute addition can not exceed 13 V.
Running on internal charge pump, intrinsic self limitation allows exceeding those values without any damage.
Start-up voltage sequence (V
CC
, then V+, then V-) is critical, therefore it is not recommended to use this device using externally applied voltage to V+ and V-.
Symbol
Figure 2. ESD performance: transmitter outputs, receiver inputs
Parameter Test conditions Min.
Typ.
Max.
Unit
ESD
ESD
ESD protection voltage
ESD protection voltage
Human body model
IEC-1000-4-2
± 15
± 8 kV kV
Unit
V
V
V
V
V
V
V
V
4/14 DocID8784 Rev 7
ST3232EB, ST3232EC Electrical characteristics
Symbol
I
SUPPLY
C
1
- C
4
= 0.1 µF, V
CC
= 3 V to 5.5 V, T
A
= -40 to 85 °C, unless otherwise specified. Typical values are referred to T
A
= 25 °C.
Parameter
Table 4. Electrical characteristics
Test conditions
V
CC
Power supply current No Load, V
CC
= 3 V or 5 V, T
A
= 25 °C
Min.
Typ.
Max.
Unit
0.3
1 mA
Symbol
V
TIL
V
HYS
V
TIH
I
IL
C
1
- C
4
= 0.1
µF, V
CC
= 3 V to 5.5 V, T
A
= -40 to 85 °C, unless otherwise specified. Typical values are referred to T
A
= 25 °C.
Parameter
Input logic threshold low
Transmitter input hysteresis
Table 5. Logic input
Test conditions
T-IN
Min.
Typ.
0.25
Max.
0.8
Unit
V
V
Input logic threshold high
Input leakage current
V
CC
= 3.3 V
V
CC
= 5 V
T-IN
2
2.4
± 0.01
± 1
V
µA
Symbol
V
TOUT
R
TOUT
I
SC
I
TOL
C
1
- C
4
= 0.1 µF tested at 3.3 V
±
10 %, V
CC
= 3 V to 5.5 V, T
A
= -40 to 85 °C, unless otherwise specified. Typical values are referred to T
A
= 25 °C.
Parameter
Table 6. Transmitter
Test conditions Min.
Typ.
Max.
Unit
Output voltage swing
Transmitter output resistance
Output short-circuit current
All transmitter outputs are loaded with
3 k Ω to GND
V
CC
= 0 V, V
OUT
= ± 2 V
± 5
300
± 5.4
10M
±
60
V
W mA
Output leakage current
V
CC
= 0 V or 3.3 V to 5.5 V
V
OUT
=
±
12 V
Transmitters disable
±
25 µA
DocID8784 Rev 7 5/14
14
Electrical characteristics ST3232EB, ST3232EC
C
1
- C
4
= 0.1 µF tested at 3.3 V
±
10%, V
CC
= 3 V to 5.5 V, T
A
= -40 to 85 °C, unless otherwise specified. Typical values are referred to T
A
= 25 °C.
Symbol
V
RIN
V
RIL
V
RIH
V
RIHYS
R
RIN
V
ROL
V
ROH
Parameter
Table 7. Receiver
Test conditions
Receiver input voltage operating range
RS-232 input threshold low
RS-232 input threshold high
T
A
= 25 °C, V
CC
= 3.3 V
T
A
= 25 °C, V
CC
= 5 V
T
A
= 25 °C, V
CC
= 3.3 V
T
A
= 25 °C, V
CC
= 5 V
Input hysteresis
Input resistance T
A
= 25 °C
TTL/CMOS Output voltage low I
OUT
= 1.6 mA
TTL/CMOS Output voltage high I
OUT
= -1 mA
Min.
-25
0.6
0.8
3
Typ.
1.1
1.5
1.4
1.8
0.5
5
V
CC
-0.6
V
CC
-0.1
Max.
Unit
25
2.4
2.4
7
0.4
V
V
V
V k Ω
V
V
C
1
- C
4
= 0.1 µF tested at 3.3 V
±
10%, V
CC
= 3 V to 5.5 V, T
A
= -40 to 85 °C, unless otherwise specified. Typical values are referred to T
A
= 25 °C
Table 8. Timing characteristics
Symbol
D
R
Parameter
Data transfer rate
Test conditions
R
L
= 3 k
Ω
, C
L2
= 1000 pF one transmitter switching t
PHLR t
PLHR t
OER t
ODR
|t
- t
|t
PHLT
S
THL
|
PHLR
- t
THR
RT
|
Propagation delay input to output
R
XIN
= R
XOUT
, C
L
Receiver output enable time Normal operation
Receiver output disable time Normal operation
= 150 pF
Transmitter propagation delay difference
Receiver propagation delay difference
(1)
Transition slew rate
T
A
= 25 °C R
L
= 3 k Ω to 7 k Ω V
CC
=
3.3 V measured from +3 V to -3 V or -3 V to +3 V
C
L
= 150 pF to 1000 pF
C
L
= 150 pF to 2500 pF
1.
Transmitter skew is measured at the transmitter zero-cross points.
Min.
Typ.
Max.
Unit
250
6
4
0.15
50
50
200
50
30
30 kbps
µs ns ns ns ns
V/µs
V/µs
6/14 DocID8784 Rev 7
ST3232EB, ST3232EC
4 Application
Figure 3. Application circuits
Application
V
CC
3.0 to 3.6
4.5 to 5.5
3.0 to 5.5
C1
0.1
0.047
0.1
Table 9. Capacitance value (µF)
C2 C3
0.1
0.33
0.47
0.1
0.33
0.47
C4
0.1
0.33
0.47
DocID8784 Rev 7
Cbypass
0.1
0.1
0.1
7/14
14
Typical performance characteristics
5 Typical performance characteristics
ST3232EB, ST3232EC
Unless otherwise specified T
J
= 25 °C.
Figure 4. Output current vs. output high voltage Figure 5. Output current vs. output high voltage
Figure 6. Output current vs. output low voltage Figure 7. Output current vs. output low voltage
Figure 8. Voltage transfer characteristics for transmitter inputs
Figure 9. Receiver input resistance
8/14 DocID8784 Rev 7
ST3232EB, ST3232EC Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK
® specifications, grade definitions and product status are available at: www.st.com
.
ECOPACK
®
is an ST trademark.
DocID8784 Rev 7 9/14
14
Package information
Figure 10. SO-16 package outline
H
N
ST3232EB, ST3232EC
E
10/14
'
B*
Table 10. SO-16 package mechanical data
Dimensions (mm)
Min.
Typ.
Ref.
c
D
E
E1
A
A1
A2 b
L k e h ccc
0.10
1.25
0.31
0.17
9.80
5.80
3.80
0.25
0.40
0
9.90
6.00
3.90
1.27
Max.
1.75
0.25
0.51
0.25
10.00
6.20
4.00
0.50
1.27
8
0.10
Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.15 mm in total (both side).
Dimension “E1” does not include interlead flash or protrusions.Interlead flash or protrusions shall not exceed 0.25mm per side.
Dimensions referred to the bottom side of the package.
DocID8784 Rev 7
ST3232EB, ST3232EC
Figure 11. SO-16 recommended footprint
Package information
DocID8784 Rev 7 11/14
14
Package information
6.2 TSSOP-16 package information
Figure 12. TSSOP-16 package outline
ST3232EB, ST3232EC
12/14
Ref.
B(
Table 11. TSSOP-16 package mechanical data
Dimensions
Min.
mm
Typ.
c
D
E
E1
A
A1
A2 b
L1 k e
L aaa
0.05
0.80
0.19
0.09
4.90
6.20
4.30
0.45
0
1.00
5.00
6.40
4.40
0.65
0.60
1.00
TSSOP stands for thin shrink small outline package. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.15 mm per side. Dimension “E1” does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm per side.
Max.
0.20
5.10
6.60
4.50
1.20
0.15
1.05
0.30
0.75
8
0.10
DocID8784 Rev 7
ST3232EB, ST3232EC Revision history
Date
06-Sep-2006
21-Jan-2008
08-Feb-2008
05-Jan-2010
04-Jul-2018
Revision
Table 12. Document revision history
Changes
5
6
3
4
7
Order codes updated.
Added: Table 1 and note on Table 3.
Modified: Table 1 on page 1.
Modified: Table 1 on page 1.
Updated Table 3: Absolute maximum ratings
and Section 6: Package information .
DocID8784 Rev 7 13/14
14
ST3232EB, ST3232EC
IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2018 STMicroelectronics – All rights reserved
14/14 DocID8784 Rev 7
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